Function debounce

tfjs-layers/src/utils/generic_utils.ts:487–502

(
    f: (...args: Array<{}>) => T, waitMs: number,
    nowFunc?: Function)

 * @param waitMs The time between two consecutive calls to `f` in ms.
 */
export function debounce<T>(
    f: (...args: Array<{}>) => T, waitMs: number,
    nowFunc?: Function): (...args: Array<{}>) => T {
  let lastTime = nowFunc != null ? nowFunc() : util.now();
  let lastResult: T;
  const f2 = (...args: Array<{}>) => {
    const now = nowFunc != null ? nowFunc() : util.now();
    if (now - lastTime < waitMs) {
      return lastResult;
    }
    lastTime = now;
    lastResult = f(...args);
    return lastResult;
  };
  return f2;
}

/**
 * Returns the fusable activation given a layers identifier.